Couple ideas you could pinch from forza that I think would be good :)

- viewable replays of your fastest lap on the leaderboard, but give the option in the settings to turn that off.
- can download that persons car set up if they turn on an option for people to do so.

And also, it would be nice to have some racing on here too! I understand that could be a big push at the moment but that and online racing would be brilliant!